Infantry troops on urban combat missions carry water in flasks and water tanks. This mode of transport limits the amount of water that can be carried because of its weight and volume. On many occasions, troops encounter local water sources, such as water tanks on roofs and water from wells, which are unauthorized for use. Spring is a small water purification unit that fits into a backpack and is suitable for a platoon or squadron.
The device can filter 220-240 liters (57-63 gallons) per standard rechargeable battery. The unit produces fresh, pure water from non-saline water sources, e.g., water for agriculture, water tanks on roofs on captured building, wells, etc. The device is small and light-weight, and simplifies the logistics needed to supply large amounts of water to troops during operations.